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Small Modular Reactors Database

Glossary

UCO TRISO, UN TRISO Prismatic

Uranium oxycarbide (UCO), uranium mononitride (UN) tristructural isotropic (TRISO) fuels

TRISO prismatic: consisting of prismatic blocks

Under Construction

Construction in progress in the shops of the suppliers, preparatory onsite work, construction of nuclear safety relevant elements, cold and hot functional tests

UO2

Uranium dioxide

Most often used uranium compound for fuel elements

UO2 Cermet

Ceramic-metal fuel

Consist of ceramic fuel particles such as uranium dioxide (UO2) embedded in a metal matrix

UO2 Pellets

Uranium dioxide

Most often used uranium compound for fuel elements